I own both a Beast and a Tranx 400 High Speed. Never owned or used a Rocket.
Tranx is the smoothest reel out there. It is amazing. I use mine for rubber baits as picking up line fast is the name of the game. It can pull bucktails fine. 8's. 9's and 10's are tough due to the gear ratio. Tough, but doable.
I picked up a Beast. It is great. It comes with three handles, which is why I give a slight nod to the Beast over the Tranx 400. With the large power handle, it pulls larger bucktails easier.
And for me? I use that reel for some of my larger jerk baits as I just like how it feels in my hand.
The downside to the Beast...when you put on the large power handle, you need to adjust how you cast. If you power cast "over the top", that handle is so heavy, it will move forward and cause the reel to engage. It'll make a terrible noise and it can ruin the pawls in the reel.
There are two solutions. The one I use is simple. When I cast that thing, I tilt the reel to the side so the reel handle is either right on top during the cast, or directly below on the cast. That way the handle does not move forward and engage the reel.
Or...when you cast, make sure the handle is in the down position and don't cast hard.
But those issues are only when using the large power handle.
I don't think you can go wrong with either one. I just like how the Beast sets up a little better than the Tranx.